occurs on mount on a new fs kernel BUG at /usr/src/GFS/cluster/gfs-kernel/src/dlm/lock.c:397! invalid operand: 0000 [#1] SMP Modules linked in: lock_dlm dlm cman gfs lock_harness 8250 serial_core dm_mod CPU: 1 EIP: 0060:[<f8989b8a>] Not tainted EFLAGS: 00010282 (2.6.8.1) EIP is at do_dlm_lock+0x1d6/0x1ea [lock_dlm] eax: 00000001 ebx: ffffffea ecx: c03478b4 edx: 000059e8 esi: c1af2600 edi: f7c7ac80 ebp: 00000000 esp: f6c23e2c ds: 007b es: 007b ss: 0068 Process lock_dlm (pid: 23452, threadinfo=f6c22000 task=f6f8b290) Stack: f898da49 f4882e60 00000010 00000000 00000000 ffffffea 00000003 00000005 0000005d 00000000 00000000 20202020 30312020 20202020 20202020 20202020 30202020 f6c20018 00000001 c1af2600 00000005 c1af2600 00000001 f8989c5e Call Trace: [<f8989c5e>] lm_dlm_lock+0x6e/0x7f [lock_dlm] [<f8989cbb>] lm_dlm_lock_sync+0x4c/0x62 [lock_dlm] [<f8988181>] id_test_and_set+0xf8/0x21f [lock_dlm] [<f89884e9>] claim_jid+0x3b/0x110 [lock_dlm] [<f8988a71>] process_start+0x372/0x4e1 [lock_dlm] [<f898d49b>] dlm_async+0x1fc/0x315 [lock_dlm] [<c01157c8>] default_wake_function+0x0/0x12 [<c01157c8>] default_wake_function+0x0/0x12 [<f898d29f>] dlm_async+0x0/0x315 [lock_dlm] [<c0102161>] kernel_thread_helper+0x5/0xb Code: 0f 0b 8d 01 80 df 98 f8 c7 04 24 40 e0 98 f8 e8 5a f2 78 c7kernel BUG at /usr/src/GFS/cluster/gfs-kernel/src/dlm/lock.c:397! invalid operand: 0000 [#1] CPU: 1 EIP: 0060:[<f8989b8a>] Not tainted Using defaults from ksymoops -t elf32-i386 -a i386 EFLAGS: 00010282 (2.6.8.1) eax: 00000001 ebx: ffffffea ecx: c03478b4 edx: 000059e8 esi: c1af2600 edi: f7c7ac80 ebp: 00000000 esp: f6c23e2c ds: 007b es: 007b ss: 0068 Stack: f898da49 f4882e60 00000010 00000000 00000000 ffffffea 00000003 00000005 0000005d 00000000 00000000 20202020 30312020 20202020 20202020 20202020 30202020 f6c20018 00000001 c1af2600 00000005 c1af2600 00000001 f8989c5e [<f8989c5e>] lm_dlm_lock+0x6e/0x7f [lock_dlm] [<f8989cbb>] lm_dlm_lock_sync+0x4c/0x62 [lock_dlm] [<f8988181>] id_test_and_set+0xf8/0x21f [lock_dlm] [<f89884e9>] claim_jid+0x3b/0x110 [lock_dlm] [<f8988a71>] process_start+0x372/0x4e1 [lock_dlm] [<f898d49b>] dlm_async+0x1fc/0x315 [lock_dlm] [<c01157c8>] default_wake_function+0x0/0x12 [<c01157c8>] default_wake_function+0x0/0x12 [<f898d29f>] dlm_async+0x0/0x315 [lock_dlm] [<c0102161>] kernel_thread_helper+0x5/0xb Code: 0f 0b 8d 01 80 df 98 f8 c7 04 24 40 e0 98 f8 e8 5a f2 78 c7 >>EIP; f8989b8a <pg0+38533b8a/3fba8000> <===== >>ebx; ffffffea <__kernel_rt_sigreturn+1baa/????> >>ecx; c03478b4 <console_sem+0/14> >>edx; 000059e8 Before first symbol >>esi; c1af2600 <pg0+169c600/3fba8000> >>edi; f7c7ac80 <pg0+37824c80/3fba8000> >>esp; f6c23e2c <pg0+367cde2c/3fba8000> Code; f8989b8a <pg0+38533b8a/3fba8000> 00000000 <_EIP>: Code; f8989b8a <pg0+38533b8a/3fba8000> <===== 0: 0f 0b ud2a <===== Code; f8989b8c <pg0+38533b8c/3fba8000> 2: 8d 01 lea (%ecx),%eax Code; f8989b8e <pg0+38533b8e/3fba8000> 4: 80 df 98 sbb $0x98,%bh Code; f8989b91 <pg0+38533b91/3fba8000> 7: f8 clc Code; f8989b92 <pg0+38533b92/3fba8000> 8: c7 04 24 40 e0 98 f8 movl $0xf898e040,(%esp,1) Code; f8989b99 <pg0+38533b99/3fba8000> f: e8 5a f2 78 c7 call c778f26e <_EIP+0xc778f26e> c0118df8 <panic+0/119>